Constants The 1.30-kg head of a hammer has a speed of 8.5 m/s just before it strikes a nail and is brought to rest (Figure 1). Part A Estimate the temperature rise of a 12-g iron nail generated by 6.0 such hammer blows done in quick succession. Assume the nail absorbs all the energy. The specific heat of iron is 450 J/kg - C. Express your answer using two significant figures. Figure < 1 of 1> AT= Submit Request Answer Provide Feedback Next >

Constants Periodic Table Assume all temperatures to be exact, and neglect significant figures for small changes in dimension. On a warm day (92 °F), an air-filled balloon occupies a volume of 0.300 m³ and has a pressure of 24.0 lb/in?. Part A If the balloon is cooled to 32 °F in a refrigerator while its pressure is reduced to 14.7 lb/in?, what is the volume of the air in the container? (Assume that the air behaves as an ideal gas.) nνα ΑΣφ V = 0.170 m3 Submit Previous Answers Request Answer X Incorrect; Try Again; 6 attempts remaining

ConstanS T Pent Part A An experiment measures the temperature of a 400 g substance while steadily supplying heat to it. The figure shows the results of the experiment. (Figure 1) What is the specific heat of the solid phase? Express your answer to two significant figures and include the appropriate units. ? Value Units C = Submit Request Answer Part B What is the specific heat of the liquid phase? Express your answer to two significant figures and include the appropriate units. ? Value Units C = Submit Request Answer Part C Figure What is the melting temperature? Express your answer to two significant figures and include the appropriate units. T(°C) 80 ? 60 40 T, - Value Units 20 Q (kJ) 40 80 120 160 200 -20 Submit Request Answer -40